condition mean min max ZT0-3 34.63745 34.63745 34.63745 ZT4-7 21.8612 21.8612 21.8612 ZT8-11 15.059249999999999 15.059249999999999 15.059249999999999 ZT12-15 19.088 19.088 19.088 ZT16-19 36.88995 36.88995 36.88995 ZT20-23 32.4324 32.4324 32.4324